Modern concepts of clays as assemblages of discrete minerals form the basis for the first reevaluation of the clays and shales of Indiana since 1933. Brief explanations of the fundamentals of clay mineralogy and the major ...

Lithotypes from Pennsylvanian high-volatile bituminous coals from the Illinois Basin were isolated by hand and analyzed to investigate the influence of their chemical and petrographic composition on the amount of CO2 ...

This study assesses the coal resources of the Danville and Springfield Coal Members (Dugger and Petersburg Formations, respectively) in Indiana and provides new estimates of the tonnage of coal in the following categories ...

The Indiana coal field forms the eastern edge of the eastern interior coal basin, which is near some manufacturing areas of the United States. For this reason Indiana coal reserves are an important State and National asset.

Almost 100,000 acres of land has been disturbed by strip mining in southwestern Indiana within the past 50 years. Pike, Warrick, and Clay Counties contain about two-thirds of the strip-mined land. Strip-mined land amounts ...

Rocks, minerals, and fossils of Indiana are the foundation, directly or indirectly, of the economic well-being of the state. Utilization of rocks, minerals, and fossils has contributed to the development of civilization. ...

The Geologic Names Committee of the Indiana Geological Survey has maintained for several years tables of the more important rock- and time-stratigraphic names that have been used in Indiana. These tables show classification ...